JP2000027862A - Linear moving guide bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply a lubricant to a rolling body over a long period. SOLUTION: A reinforcing plate 10, a lubricant containing member 11 and a side seal 12 are fixed to the outside surface side of an end cap 2B from the side close to the end cap 2B in a superposed state. These reinforcing plate 10, lubricant containing member 11 and side seal 12 are fixed to a main body 2A integrally with the end cap 2B when installing screws 17A, 17B threadedly engaging with the main body 2A by penetrating through a through hole 2b of the end cap 2B penetrate through through holes 12a, 12b of the side seal 12, ring-shaped members 15A, 15B inside of through holes 11a, 11b of the lubricant containing member 11 and through holes 10a, 10b of the reinforcing plate 10. A thickness of the ring-shaped members 15A, 15B is formed slightly thicker than a thickness of the lubricant oil containing member 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear guide bearing device, and more particularly to a linear guide bearing device capable of stably supplying a lubricant to rolling elements for a long period of time.

[0002]

2. Description of the Related Art As this kind of prior art, there has been proposed a first prior art disclosed in Japanese Patent Application Laid-Open No. Hei 6-346919, which was previously proposed by the present applicant, and also a prior art proposed by the present applicant. JP-A-7-35146 (second conventional example). That is, in the first conventional example, a seal device having a seal lip portion made of rubber or synthetic resin containing a lubricant between an outer surface of a guide rail and an inner surface of a slider that moves along the guide rail. The seal lip portion comes in contact with the outer surface of the guide rail to seal the opening between the inner surface of the slider and the outer surface of the guide rail. The seal lip of the seal device is formed of a lubricant-containing rubber or a synthetic resin, and the seal lip has a self-lubricating property, so that the lubricant contained in the seal itself gradually permeates. The seal lip portion is automatically supplied to the seal friction surface, and the wear and tear of the seal lip portion is suppressed.

In the second conventional example, a layer of rubber or synthetic resin and a layer of rubber or synthetic resin containing a lubricant are at least partially overlapped and integrally joined. A seal lip portion is formed on at least the lubricant-containing rubber or synthetic resin layer of the types of layers, in contact with the outer surface of the guide rail to seal the opening between the inner surface of the slider and the outer surface of the guide rail. I have. Even in the second conventional example, since the seal lip portion has self-lubricating properties, the lubricant contained in the seal itself gradually exudes and is automatically supplied to the seal friction surface. The effect of suppressing wear of the seal lip is obtained. In addition, since the above-described structure is obtained by laminating the layers, there is an advantage that the strength of the seal lip can be freely set according to the application or the like by appropriately selecting the number of layers and the thickness of each layer.

[0004]

In the first and second prior arts, the seal lip has a self-lubricating property. Although the function and effect of suppressing wear can be obtained, a ball that guides the movement of the slider of the linear motion guide bearing device when durability is particularly required only with the lubricant oozing out of the lubricant-containing rubber or synthetic resin. There is an unsolved problem that it is not enough to maintain even a smooth rolling motion of a rolling element such as a roller.

[0005] In the above-described first and second prior art lubricant-containing sealing devices, the seal lip portion is pressed against the guide rail only by the elastic force of the seal itself, so that it is not sufficient as a seal. However, there is a case where a sufficient pressing force cannot be obtained as a device for supplying the lubricant. The present invention has been made in view of such unresolved problems of the conventional technology, and constantly supplies a lubricant that can maintain a smooth rolling motion of a rolling element. It is an object of the present invention to provide a linear motion guide bearing device capable of performing the following.

[0006]

According to the present invention, a slider is loosely fitted on an axially extending guide rail having a rolling element rolling groove on an outer surface thereof. A rolling element circulating path including a rolling element rolling groove opposed to the rolling element rolling groove of the rail and a rolling element return path connected to both ends of the load rolling element rolling groove via curved paths,
In a linear motion guide bearing device in which a number of rolling elements for relatively moving the slider along the guide rail are loaded in the rolling element circulation path, a lubricant-containing member may be provided at an end of the slider, with a plate-shaped member. While sandwiched between other plate-shaped members and attached while at least a part of the lubricant-containing member is in contact with the guide rail, the lubricant-containing member, the plate-shaped member and the other plate-shaped member are The slider was fixed to the slider by screws passing through the ring-shaped member.

In the present invention, the lubricant-containing member is sandwiched between the two plate-like members and is disposed at the end of the slider in contact with the guide rail. When moving along the guide rail, the lubricant that gradually seeps out of the lubricant-containing member over time is reliably supplied to the guide rail, and the lubricant supplied to the guide rail is
It is supplied to the rolling elements via the surface of the guide rail and the rolling element rolling grooves.

In addition, since the lubricant-containing member itself is sandwiched between the two plate-like members, unlike the case where the seal lip portion contains a lubricant, the rolling element can keep rolling for a long period of time. It is easy to make the size large enough to contain a sufficient amount of lubricant, and it is not necessary to attach the lubricant-containing member to a steel plate or the like, so that assembly is easy.

[0009] The lubricant-containing member is fixed to the slider by screws passing through the inside of the ring-shaped member. The shape of the lubricating oil-containing member can be, for example, a substantially U-shape straddling the guide rail, and in such a case, when the lubricant seeps out of the lubricant-containing member straddling the guide rail, the lubricant-containing member itself becomes Because of self-shrinkage, the distance between the U-shaped sleeves of the lubricant-containing member is reduced. For this reason,
The lubricant-containing member comes into constant contact with the guide rail. In this case, a through-hole that is open to the side opposite to the guide rail side is formed in a connecting portion that connects between the U-shaped sleeve portions of the lubricating oil-containing member, and the through-hole is formed outside the inner diameter of the through-hole. If a ring-shaped member or a columnar member having a large diameter is inserted, the through-hole is expanded and the connecting portion easily spreads right and left, so that both sleeve portions are securely deformed in a direction pressed against the guide rail. Further, if a biasing force for pressing both sleeves against the guide rail is generated by the hollow ring-shaped member or the solid cylindrical member as described above, even if there is some manufacturing error or the like in the lubricant-containing member, the guide rail may be used. There is no gap between the member and the lubricant-containing member. Thus, the lubricant that has oozed out of the lubricant-containing member is stably supplied to the guide rail.

[0010] The ring-shaped member into which the screw is inserted is
It is possible to insert the lubricating oil-containing member, in which case the thickness of the ring-shaped member is desirably greater than the thickness of the lubricating oil-containing member. With such a configuration, the end of the ring-shaped member projects from the front surface or the back surface of the lubricant-containing member, so that the lubricant-containing portion is sandwiched between the two plate-shaped members, The friction between them is reduced, and the lubricant-containing member can be more reliably brought into contact with the guide rail.

When the shape of the lubricating oil-containing member is substantially U-shaped across the guide rail, the bottom surface of the U-shaped concave portion of the lubricating oil-containing member is formed with no external force applied to the lubricating oil-containing member. It is desirable to have a circular arc shape in which the center side protrudes from the sleeve side. With such a configuration, even if the lubricant-containing member is deformed in a direction in which both sleeve portions are pressed against the guide rail, the arc-shaped shape approaches the horizontal state, so the lubricant-containing member is stable on the guide rail. Contact.

Hereinafter, the material of the lubricant-containing member of the present invention will be described in detail. That is, as a lubricating oil-containing member,
For example, a material in which a lubricant is contained in a material such as rubber or synthetic resin can be adopted. In the case of a lubricant-containing member in which a rubber is made to contain a lubricant, for example, a polyurethane rubber cured in a state containing grease can be used.

The polyurethane rubber is a compound formed by reacting a polyisocyanate with an active hydrogen compound. As the polyisocyanate, tolylene diisocyanate, hexamethylene diisocyanate and the like can be used. Examples of active hydrogen compounds include hydrocarbons such as polybutadiene, polyethers such as polyoxypropylene, castor oil, polyester, and long-chain active hydrogen compounds such as polycarbonate, water, polyhydroxy compounds such as ethylene glycol, amino alcohols, and polyamino compounds. Short chain active hydrogen compounds can be used.

As grease, ordinary grease such as lithium mineral oil soap grease can be used. Next, when a lubricant is contained in a synthetic resin to produce a lubricant-containing member,
The lubricant-containing member is made of a synthetic resin selected from the group of polyolefin resins having basically the same chemical structure, such as polyethylene, polypropylene, polybutylene, and polymethylpentene, and a paraffin such as poly α-olefin oil as a lubricant. Injection of raw materials prepared by mixing any of oils such as hydrocarbon oils, naphthenic hydrocarbon oils, mineral oils, ether oils such as dialkyldiphenyl ether oils, and ester oils such as phthalic acid esters, alone or as a mixed oil What was formed by molding can be applied, and what added various additives, such as an antioxidant, a rust inhibitor, an anti-wear agent, a defoamer, an extreme pressure agent, etc. in advance to the lubricant may be used.

The composition ratio of the lubricant-containing member is 20 to 80% by weight of the polyolefin resin and 80 to 20% by weight of the lubricant based on the total weight. 20 polyolefin resins
When the amount is less than% by weight, a certain level or more of hardness, strength and the like cannot be obtained. 80% by weight of polyolefin resin
(That is, when the amount of the lubricant is less than 20% by weight), the supply of the lubricant is reduced, and the effect of reducing the wear of the lip portion of the sealing device is reduced.

The above synthetic resin groups have the same basic structure but different average molecular weights, from 1 × 10 ^{3 to} 5 × 10 ^6.
Range. Among them, average molecular weight 1 × 10
One having a relatively low molecular weight of ³ to 1 × 10 ⁶ and 1 × 1
0 ⁶ a to 5 × 10 ⁶ as those of ultra-high molecular weight, using a mixture according to either alone or in need. In order to improve the mechanical strength of the lubricant-containing member of the present invention, a thermoplastic resin and a thermosetting resin as described below may be added to the above-mentioned polyolefin resin.

As the thermoplastic resin, various resins such as polyamide, polycarbonate, polybutylene terephthalate, polyphenylene sulfide, polyether sulfone, polyether ether ketone, polyamide imide, polystyrene and ABS resin can be used. Thermosetting resins include unsaturated polyester resins, urea resins, melamine resins, phenolic resins, polyimide resins,
Each resin such as an epoxy resin can be used.

These resins may be used alone or as a mixture. Further, in order to disperse the polyolefin resin and the other resin in a more uniform state, a suitable compatibilizer may be added as necessary. Further, a filler may be added to improve the mechanical strength.
For example, calcium carbonate, magnesium carbonate, inorganic whiskers such as potassium titanate whiskers and aluminum borate whiskers, or glass fiber or asbestos,
Inorganic fibers such as metal fibers and those obtained by braiding them into a cloth shape, and in the case of organic compounds, carbon black, graphite powder, carbon fibers, aramid fibers, polyester fibers, and the like may be added.

Further, in order to prevent deterioration of the polyolefin resin due to heat, aging of N, N'-diphenyl-P-phenylenediamine, 2,2'-methylenebis (4-ethyl-6-t-butylphenol) and the like. For the purpose of preventing deterioration due to light,
-Octoxybenzophenone, 2- (2'-hydroxy-3'-tert-butyl-5'-methyl-phenyl) -5
-An ultraviolet absorber such as chlorobenzotriazole may be added.

The addition amount of all the above additives (other than polyrefine + oil) is preferably 20% by weight or less of the total amount of the forming raw material in order to maintain the lubricant supply capacity. .

[0021]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show a first embodiment of the present invention.
It is a figure showing an embodiment. First, the structure will be described. As shown in FIG. 1 which is a perspective view of the linear motion guide bearing device of the present embodiment, the rolling element rolling grooves 3A and 3B are formed on the outer surface.
And a guide rail 1 extending in the axial direction and a slider 2 assembled across the guide rail 1.

More specifically, one of the rolling element rolling grooves 3A formed of axially concave grooves having a substantially arc-shaped cross section is formed at the ridgeline where the upper surface 1a and both side surfaces 1b of the guide rail 1 intersect. At the same time, the other rolling element rolling groove 3B having a substantially semicircular cross section is formed at an intermediate position between both side surfaces 1b of the guide rail. At the bottom of the rolling element rolling groove 3B, an escape groove 3a of a retainer for preventing the rolling element from falling off when the slider 2 is not assembled to the guide rail 1 is formed.

On the other hand, the slider 2 comprises a slider body 2A and end caps 2B attached to both ends thereof. The slider body 2A is provided on the inner side surfaces of both sleeves 4 with rolling element rolling grooves 3A of the guide rail 1. 3B, a rolling element rolling groove (not shown) facing the rolling element and a rolling element return path axially penetrating the thick portion of the sleeve. On the other hand, the end cap 2B has a curved path (not shown) for connecting the rolling element rolling groove of the slider body 2A and a rolling element return path parallel thereto, and the rolling element rolling groove and the rolling element return path are provided. The rolling element circulation circuit is formed by the path and the curved paths at both ends. A number of rolling elements made of, for example, steel balls are loaded in the rolling element circulation circuit. In the figure, reference numeral 7 denotes a grease nipple.

The end cap 2B is an injection-molded product of a synthetic resin material, and has a substantially U-shaped cross section. And
As shown in FIG. 2 which is a perspective view showing an assembled state of the end portion of the slider 2, a reinforcing plate 10 as a plate-like member is provided on each outer surface side of both end caps 2 B from the side near the end cap 2 B. The lubricant-containing member 11 and the side seal 12 as a plate-like member are fixed in an overlapping state.

Of these, the reinforcing plate 10 is a substantially U-shaped steel plate conforming to the outer shape of the end cap 2B.
The two sleeves 10A and 10B have through holes 10a and 10b for penetrating the mounting screw, and the connecting part 10C connecting the two sleeves 10A and 10B has a through hole 10c for grease nipple. Is formed. The reinforcing plate 10 is not in contact with the guide rail 1.

The side seal 12 is made of a substantially U-shaped steel plate conforming to the outer shape of the end cap 2B and a polyurethane containing grease integrally formed on the outer surface of the steel plate having a shape similar to the steel plate. It is made up of rubber. The inner surface of the lip portion 13 of the side seal 12 which contacts the guide rail 1 is guided according to the sectional shape of the guide rail 1 so that the gap between the slider 2 and the guide rail 1 can be sealed. Upper surface 1 of rail 1
a and a shape capable of sliding contact with the outer side surface 1b, more specifically,
The rolling elements are formed in a shape that allows sliding contact with the rolling grooves 3A and 3B and the relief grooves 3a. It should be noted that both sleeve portions 12A and 12B of the side seal 12 are also provided with through holes 12 for attaching screws.
a, 12b are formed, and both sleeve portions 12a
A through-hole 12c for a grease nipple is formed in a connecting portion 12C that connects A and 12B.

The lubricant-containing member 11 sandwiched between the side seal 12 and the reinforcing plate 10 is formed in a substantially U-shape according to the outer shape of the end cap 2B. The surface of the guide rail 1 has a flat shape, not a tapered shape, and like the inner surface of the lip portion 13, the upper surface 1 of the guide rail 1 matches the cross-sectional shape of the guide rail 1.
a and the outer surface 1b including the rolling element rolling grooves 3A and 3B.

As shown in FIG. 3 (a) which is a front view of the lubricant containing member 11 and FIG. 3 (b) which is a side view thereof, the both sleeves 11A and 11B of the lubricant containing member 11 are provided. Also, through holes 11a and 11b for penetrating the mounting screw are formed, and a through hole 11c for the grease nipple is formed in the connecting portion 11C connecting the both sleeve portions 11A and 11B. Each of 11a and 11b is open to the outer surface side of the sleeve portions 11A and 11B, and the through hole 11c is open to the upper surface side of the connecting portion 11C.

The inner surface of the concave portion of the lubricant containing member 11 has the upper surface 1a of the guide rail 1 and the rolling element rolling grooves 3A, 3A.
B is formed so as to be in sliding contact with the outer side surface 1b including B, and a portion of the inner surface of the concave portion facing the rolling element rolling grooves 3A, 3B and the relief groove 3a of the guide rail 1 has the respective grooves 3A, The protrusions 1 are so slidably contact with the inner surfaces of 3B and 3a.
1f, 11g, 11d and 11e are formed. Further, of the inner surfaces of the recesses of the lubricant containing member 11, the inner bottom surface 11 h slidingly contacting the upper surface 1 a of the guide rail 1 is attached to the sleeve portions 11 A and 11 B in a state in which no external force is applied to the lubricant containing member 11. It has an arc shape with a radius of curvature R such that the center side protrudes downward from the near end side.

Then, both sleeve portions 11 of the lubricant containing member 11
Ring-shaped members 15A and 15B are fitted into the through holes 11a and 11b formed in A and 11B, respectively. These ring-shaped members 15A, 15B
FIG. 4A which is a front view thereof, and FIG. 4 which is a side view thereof.
It is a short cylindrical member as shown in (b), and its outer diameter is such that it can be easily fitted into the through holes 11a and 11b.

The connecting portion 11C of the lubricant containing member 11
The ring-shaped (or solid cylindrical) member 16 is also fitted into the through hole 11c formed in the above. This ring-shaped member 16 is also a short cylindrical member as shown in FIG. 5A which is a front view thereof, and FIG. 5B which is a side view thereof. However, the outer diameter D _AR of the ring-shaped member 16 is larger than the inner diameter D _A of the through hole 11c. That is, by fitting the ring-shaped member 16 into the through-hole 11c, the through-hole 11c can be expanded.

Further, the thickness V of the ring-shaped members 15A, 15B and 16 is larger than the thickness W of the lubricant-containing member 11.
It is slightly thicker (for example, about 0.2 mm). That is, the ring-shaped members 15A, 15B and 16 are
When fitted into a to 11c, the ends of the ring-shaped members 15A, 15B and 16 project from the front surface or the back surface of the lubricant-containing member 11, as shown in FIG.

The reinforcing plate 10, the lubricant-containing member 11, and the side seal 12 are provided with mounting screws 17A, 17B which penetrate through the through holes 2a, 2b of the end cap 2B and are screwed to the main body 2A. 12 through holes 12
a, 12b, through holes 11a, 11 of lubricant-containing member 11
By passing through the through-holes 10a and 10b of the ring-shaped members 15A and 15B and the reinforcing plate 10 on the inner side b, it is fixed to the main body 2A integrally with the end cap 2B.

Next, the operation of the present embodiment will be described. That is, when the slider 2 moves on the guide rail 1 fixed to the machine base, the rolling elements in the slider 2 move at a slower speed than the slider 2 in the moving direction of the slider 2 while rolling in the rolling element rolling path. Then, the U-turn on the curved path on one end side moves while rolling in the reverse direction on the rolling element return path, and the circulation returning to the inside of the rolling element rolling path after making a reverse U-turn on the curved path on the other end side is repeated.

When the linear motion guide bearing device is driven in this manner, the lubricant containing member 11 also moves while being in contact with the guide rail 1, and the influence of frictional heat at the time of the movement is added. The lubricant gradually exudes with time, and the exuded lubricant rolls in the rolling element rolling grooves 3A, 3B of the guide rail 1, particularly through the rolling element rolling grooves 3A, 3B. Automatically supplied to rolling elements. Due to this self-lubricating property, stable and smooth operation is performed for a long time. Therefore, in particular, lubricant is supplied from outside to the slider 2.
, And good operation can be continued for a long time at a low torque without supplying it to the motor.

Since the inner surface of the concave portion of the lubricant containing member 11 is matched with the cross-sectional shape of the guide rail 1 as described above, as shown in FIG.
Can adhere to the upper surface 1a and the side surface 1b of the guide rail 1, and as the lubricant seeps out of the lubricant-containing member 11, the lubricant-containing member 11 itself contracts itself. Due to the contraction force, the sealing surface of the guide rail 1 is always in close contact with the surface to be sealed, and the sealing function and the lubricating function are achieved.

In the case of the present embodiment, the lubricant containing member 11
Since the side seal 12 is used as the plate-shaped member on the outer side, the sealing performance is further improved. In particular, in the present embodiment, since the upper surface side of the through hole 11c formed in the connecting portion 11C of the lubricant containing member 11 is cut open,
As shown in FIG. 8A, the sleeve portions 11A and 11B can be easily pushed right and left, so that the operation of attaching the lubricant containing member 11 across the guide rail 1 can be easily performed.

Since the ring-shaped member 16 having an outer diameter larger than the inner diameter is fitted into the through hole 11c, the lubricant-containing member 11 is straddled over the guide rail 1 as shown in FIG. In the detached state, the ring-shaped member 16 pushes the through hole 11c right and left, thereby expanding the sleeve 11A.
And 11B are pressed against the guide rail 1. For this reason, even if there is a slight manufacturing error in the dimensions of the lubricant-containing member 11, and even if the lubricant-containing member 11 is slightly worn, the lubricant-containing member 11 is more reliably placed on the surface to be sealed of the guide rail 1. It can be always in close contact. In this case, in the structure in which the upper surface side of the through hole 11c is cut open, the force of the ring-shaped member 16 to push and spread is converted into an urging force for pressing the sleeve portions 11A and 11B against the guide rail 1. It is very advantageous for the operation.

Further, the thickness V of the ring-shaped members 15A, 15B and 16 is made larger than the thickness W of the lubricant-containing member 11, and the ends of the ring-shaped members 15A, 15B and 16 are Since the mounting means of the lubricant containing member 11 is configured to protrude from the front surface or the back surface of the lubricant 11, the lubricant containing member 11 is The friction between is reduced. For this reason, the deformation of the lubricant containing member 11 in the direction perpendicular to the axial direction of the guide rail 1 due to the self-shrinkage or the urging force described above is performed smoothly, so that the lubricant containing member 11 is always surely attached to the guide rail 1. Can be in close contact.

Further, since the inner bottom surface 11h of the concave portion of the lubricant containing member 11 is formed in the above-described arc shape, the sleeve portions 11A and 11B of the lubricant containing member 11 are moved by the self-shrinkage and the urging force. , The inner bottom surface 11h approaches a horizontal state, and the inner bottom surface 11h comes into stable contact with the upper surface 1a of the guide rail 1.

Further, the lubricant-containing member 11 is
In addition, since it is a member interposed between the side seals 12, it is easy to have a size that can contain a sufficient amount of lubricant to maintain the rolling of the rolling element for a long period of time. In addition, since the lubricant-containing member 11 is not structured to be fixed to another member such as a steel plate, it is possible to reduce the cost of parts of the lubricant-containing member 11 which is a consumable, and to simplify the installation. There is an advantage that is.

Then, the lubricant-containing member 11 is connected to the reinforcing plate 1.
0 and the side seal 12, the portion of the side seal 12 that comes into contact with the guide rail 1, that is, the lip portion 13 is unlikely to roll up even when the slider 2 reciprocates. Leakage of internal grease to the outside is also reduced. Further, the lubricant that has oozed out of the lubricant-containing member 11 is also supplied to the lip portion 13 of the side seal 12 that comes into contact with the guide rail 1.
It is also useful for reducing the wear of the lip portion 13, and in particular, in the present embodiment, since the lip portion 13 is molded from a polyurethane rubber that has been cured in a state containing grease, the lubricant itself can be used. As a result, the wear of the lip portion 13 can be further reduced. Then, since the wear of the lip portion 13 is minimized, the sealing performance of the lip portion 13 is maintained for a long time, foreign matter is prevented from entering the main body 2A side, and the life of the linear motion guide bearing device itself is prolonged. There is an advantage that it can be achieved.

In the structure of the present embodiment, since the lubricant for the rolling elements is constantly supplied from the lubricant containing member 11, the grease nipple mounting hole may be closed with a blind plug. If necessary, the opening may be opened at an appropriate time to supply lubricant such as grease into the slider. Here, in the present embodiment, the side seal 12 corresponds to a plate-shaped member, and the reinforcing plate 10 corresponds to another plate-shaped member.

FIGS. 9 and 10 show a second embodiment of the present invention. The same members and portions as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. That is, in the present embodiment, the shape of the lubricant-containing member 11 is changed in the linear motion guide bearing device having the same structure as that of the first embodiment.

More specifically, as shown in FIG. 9 which is a front view of the lubricant containing member 11, the sleeve portions 11A and 11B are continuous with the through holes 11a and 11b through which the mounting screws penetrate, and are connected to the sleeve portion 11A. Notches 20A and 20B are formed so that the outer surface side and the distal end side of the ring-shaped member 15 and 11B are opened, and the ring-shaped member 15 fitted into the through holes 11a and 11b.
The inner diameters of A and 15B are larger than the outer diameters of the threaded portions of the mounting screws 17A and 17B. Other configurations are the same as those in the first embodiment.

With such a configuration, FIG. 10 is a front view of the lubricant-containing member 11 in a state of straddling the guide rail 1.
As shown in the figure, when the mounting screws 17A and 17B are loosened,
Since the ring-shaped members 15A and 15B can move outward,
Only the lubricant-containing member 11 can be removed from the linear motion guide bearing device so as to be pulled upward. Also, the new lubricant-containing member 11 can be fitted from above the guide rail 1 without removing the side seals 12 and the like from the main body 2A, and pushes the ring-shaped members 15A and 15B inward to push the through holes 11a and If the mounting screws 17A and 17B are tightened after being positioned in the inside 11b, the lubricant-containing member 11 can be mounted.

That is, according to the configuration of the present embodiment, the lubricant-containing member 11 in which the lubricant has sufficiently permeated can be easily replaced with a new lubricant-containing member 11.
With the cassette system, lubricant can be replenished with simple effort and without soiling the hands. Other functions and effects are the same as those in the first embodiment.

FIG. 11 is a view showing a third embodiment of the present invention, and FIGS.
It is a perspective view which shows the modification of the ring-shaped member 16 fitted in the through-hole 11c of FIG. The configuration other than the ring-shaped member 16 is the same as that of the first embodiment. That is, in the present embodiment, the slit 1 extending in the axial direction is formed on the outer peripheral surface of the ring-shaped member 16 formed of a deformable material such as a metal or a polymer material (plastic, rubber, or the like).
6a. As in the above embodiments, the inner diameter of the through-hole 11c is made slightly smaller than the outer diameter of the ring-shaped member 16 so that the ring-shaped member 16 is fitted into the through-hole 11c with the diameter reduced. However, since the slits 16a are formed, the elastic deformation in the direction in which the diameter of the ring-shaped member 16 expands / contracts can be made larger and smoother. Then, since the effect of expanding the through hole 11c can be stably obtained over a long period of time, the urging force for pressing the sleeve portions 11A and 11B against the guide rail 1 is maintained for a long period of time, and the first embodiment is performed. The same operation and effect as in the embodiment can be obtained more reliably.

The diameter-expanding action of the ring-shaped member 16 when fitted in the through hole 11c is determined by the size and number of the slits 16a formed therein, the thickness and material of the ring-shaped member 16, and the like. The urging force for pressing the sleeves 11A and 11B against the guide rail 1 and the wear limit of the lubricant-containing member 11 are determined by the deformation characteristics of the ring-shaped member 16. Therefore, each of the above factors depends on the size of the applied linear guide bearing device. It is necessary to appropriately select the material according to the sheath specifications, the rigidity of the lubricant-containing member 11, and the like. Therefore, the number of slits 16a and the like are not limited to the examples shown in FIGS. 11A to 11D, and are completely arbitrary.

FIG. 12 is a view showing a modification of the third embodiment, in which a solid cylindrical member 16A is fitted into the through hole 11c instead of the ring member 16. In the above, a slit 16b is formed in the columnar member 16A so that the diameter can be expanded or reduced. And even if such a columnar member 16A is used, the same operation and effect as when the ring-shaped member 16 as shown in FIG. 11 is used can be obtained. Since the diameter-expanding action of the columnar member 16 is determined by the material thereof, the size and the number of the slits 16b, and the like, each factor is applied to the linear motion guide as in the case of the ring-shaped member 16. It is necessary to appropriately select the size and specifications of the bearing device, the rigidity of the lubricant-containing member 11, and the like. Therefore, the size and number of the slits 16b are not limited to the examples shown in FIGS. 12A to 12C, and are completely arbitrary.

FIG. 13 is a view showing the fourth embodiment of the present invention, and is a front view of the lubricant containing member 11 in a state of straddling the guide rail 1. The same members and parts as those in the above-described embodiments are denoted by the same reference numerals, and the description thereof will not be repeated. That is, in the present embodiment, a total of two through-holes 11c are formed at positions from both the sleeves 11A and 11B of the connecting portion 11C of the lubricant-containing member 11, and each through-hole 1c is formed.
The ring-shaped member 16 having the slit 16a described in the third embodiment is fitted into 1c.

As described above, even in the configuration in which a plurality of through holes 11c and a plurality of ring-shaped members 16 are provided, the connecting portion 11C of the lubricant-containing member 11 tends to be curved inward due to the expanding force of the ring-shaped members 16. Accordingly, an urging force is generated to press the sleeves 11A and 11B against the guide rail 1. Therefore, the same operation and effect as those of the first embodiment can be obtained. Note that three or more through holes 11c may be formed,
Instead of the ring-shaped member 16, a columnar member 16A as shown in FIG. 12 may be fitted into the plurality of through holes 11c.

In the above embodiment, the lip 13
Is described from rubber containing a lubricant. However, since the lubricant is supplied from the lubricant containing member 11 to the lip 13, the lip 13 is made of NBR (acrylonitrile pig) containing no lubricant. (Didene rubber). Further, in the configuration of each of the above embodiments,
The reinforcing plate 10 may be omitted, and the lubricant-containing member 11 may be disposed sandwiched between the end cap 2B and the side seal 12, or the lubricant-containing member 11 substantially functions as a sealing device. Instead of the side seal 12, a steel plate similar to the reinforcing plate 10 may be provided as a reinforcing plate or a protector. In some cases, the lubricant-containing member 11
Between the end cap 2B and the reinforcing plate 10, a side seal 12 may be provided.

Further, in each of the above embodiments, the thickness V of the ring-shaped members 15A, 15B, 16 is larger than the thickness W of the lubricant containing member 11, but the thickness V is equal to the thickness W. Alternatively, the thickness V of each of the ring-shaped members 15A and 15B may be larger than the thickness W of the lubricant-containing member 11. In short, when the lubricant-containing member 11 is fixed by tightening the mounting screws 17A and 17B, the screws 17A and 17B are excessively tightened, so that the lubricant-containing member 11 moves in a direction perpendicular to the axial direction of the guide rail 1 of the lubricant-containing member 11. It suffices if the relationship between the thickness V and the thickness W does not hinder the deformation.

The linear motion guide bearing device to which the present invention can be applied is not limited to the type of the embodiment described above. For example, the load rolling element rolling groove may be other than two on one side. The moving body may be, for example, a roller instead of a ball.

[0056]

As described above, according to the present invention,
The lubricant that gradually seeps out of the lubricant-containing member over time,
Since the rolling elements can be supplied to the rolling elements via the guide rails, there is an effect that smooth rolling of the rolling elements can be maintained. In this case, in the case of using the side seal as the plate-like member, the lubricant from the lubricant-containing member can reduce the wear of the contact surface of the side seal with the guide rail, and the foreign matter enters the rolling element rolling groove. Can be prevented, and the life of the linear motion guide bearing device can be further increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a linear motion guide bearing device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an attached state of each member at an end of a linear motion guide bearing device.

FIG. 3 is a diagram illustrating a configuration of a lubricant-containing member according to the first embodiment.

FIG. 4 is a diagram showing a configuration of a ring-shaped member.

FIG. 5 is a diagram showing a configuration of a ring-shaped member.

FIG. 6 is a side view of the lubricant-containing member with the ring-shaped member attached.

FIG. 7 is a front view of a lubricant containing member straddling a guide rail.

FIG. 8 is an explanatory diagram of an operation.

FIG. 9 is a front view illustrating a configuration of a lubricant containing member according to a second embodiment.

FIG. 10 is an explanatory diagram of an operation of the second embodiment.

FIG. 11 is a perspective view showing a third embodiment.

FIG. 12 is a perspective view showing a modification of the third embodiment.

FIG. 13 is a front view showing the configuration of the fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide rail 1a Top surface 1b Side surface 2 Slider 2A Main body 2B End cap 3A, 3B Rolling member rolling groove 10 Reinforcement plate (plate-like member) 11 Lubricant-containing member 11A, 11B Sleeve 11C Connecting portion 11a-11c Through hole 12 Side Seal (plate-shaped member) 13 Lip portion 15A, 15B Ring-shaped member 16 Ring-shaped member 16A Column-shaped member 17A, 17B Mounting screw 20A, 20B Notch

Claims (1)

[Claims] A slider is loosely fitted on an axially extending guide rail having a rolling element rolling groove on an outer surface, and the slider is opposed to a rolling element rolling groove of the guide rail. And a rolling element circulation path including a rolling element return path connected to both ends of the load rolling element rolling groove via a curved path,
In a linear motion guide bearing device in which a number of rolling elements for relatively moving the slider along the guide rail are loaded in the rolling element circulation path, a lubricant-containing member is provided at an end of the slider, a plate-shaped member, While sandwiched between other plate-shaped members and attached while at least a part of the lubricant-containing member is in contact with the guide rail, the lubricant-containing member, the plate-shaped member and the other plate-shaped member are A linear guide bearing device fixed to the slider by a screw passing through the ring-shaped member.